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Paper   IPM / Astronomy / 11440
School of Astronomy
  Title:   Cosmic string collision in cosmological backgrounds
1.  H. Firouzjahi
2.  S. Khoeini-Moghaddam
3.  Sh. Khosravi
  Status:   Published
  Journal: Phys. Rev. D
  No.:  12
  Vol.:  81, 123506
  Year:  2010
  Pages:   [11 pages]
  Publisher(s):   APS
  Supported by:  IPM
The collisions of cosmic string loops and the dynamics of junction formations in expanding backgrounds are studied. The key parameter controlling the dynamics of junction formation, the cosmic strings zipping and unzipping, is the relative size of the loops compared to the Hubble radius at the time of collision. We study analytically and numerically these processes for large superhorizon size loops, for small subhorizon size loops as well as for loops with the radii comparable to the Hubble radius at the time of collision.

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